Patent GB-245616-A (GB)
Title: Improvements in the manufacture of wire hollow cord or cable
IPC: D07B7/14
Filed: 1925-02-04
Abstract: 245,616. Fraser, H. A., and Crighton, P. F. Feb. 4, 1925. Coiling; shearing-adjuncts.-In a machine for making wire hollow cord or cable by coiling a series of wires simultaneously on a mandrel, the wires pass through a guide which is traversed parallel with the mandrel to which the wires are secured by a gripper which is positively rotated to perform the coiling operation, the guide being then returned together with the cable, from which a length is then cut. A number of wires bare led from reels at an inclination to a wire mandrel a, over guide pulleys and through rabbets in a pair of plates m<1> adjustably secured to a guide m<2> which is traversed on rods m<6> parallel with the mandrel by a rack l<5> traversed in one direction by a pinion n and returned by a weight n, or spring. The mandrel is rotatably mounted at one end in a bearing a<1> and the other end passes into a hollow shaft d which is provided with gripping-levers c<1> operated by a tapered sleeve e for clamping the ends of the wires to the mandrel. The shaft d is driven from a shaft h rotated by a belt g* through a clutch g, g<1> controlled by a lever f. The lever f which is pivoted at f<1> is raised by a spring f<4> and is pushed down to operate the movable member g of the clutch by a weight i<1> which drops on a lever i connected to the lever f by a rod f<3>. The weight is secured to a cord or chain i<4> which is wound on a sleeve i<5> capable of rotation round a hollow extension i<6> of the shaft h. The lever f is held in an intermediate position so as to stop the machine by a handle p, a pin p<1> on which, in the position shown, has engaged the inclined end of a spring- returned lever carrying a catch i<2> so as to release the catch from a downward extension i* of the lever f and an extension p<5> on which frictionally engages the rack. To start the machine the lever p is pulled back and retained in position by a pin p<2> engaging a notch p<3> in a lever p'. The leaver f is thereupon raised by the spring f<4> so as to push up a link k<8> carried thereby so as to withdraw a stop lever k<7> from contact with a stop k<5> on a spring-pressed link k<4> carrying a friction-roller k<3>. The roller k<3> is pressed into engagement with the belt g* and with a frictionroller k' so as to rotate by worm gear a shaft k. A cam projection j<3> on the shaft k now pushes forward a spring-rotated rod j<1> connected to a pair of levers j<2>, j<2*> so as to release them from the head of a pin i<7>, which is keyed to the extension i<6> and normally prevents relative rotation of the sleeve i<5> and extension i<6> through a leather washer i<9>. The sleeve i<5> is thus freed and the weight i<1> falls so as to lower the lever f and thus put in the clutch g, g<1>, and withdraw the friction roller k' to stop the shaft k. Downward motion of the lever f also causes the sleeve to be operated through the lever e<1> to cause the jaws c' to grip the work and the pinion n is clutched to a worm wheel n<5>, driven by a worm on the shaft d, by a taper pin n' which is pushed into a split taper sleeve on the worm wheel by an adjustable spring buffer n<8> on the lever f. The shafts d, h are rotated and the guide m traversed by the pinion and rack to perform the coiling operation. The guide is furnished with a pivoted plate m‹ bearing on the wires at the side opposite the plates m<1>. When a stop l<4> on the rack engages an arm l<2> on a rock shaft l, the stop arm l<6> is pushed into position to engage the stop k<5> is withdrawn, and when the stop q engages the catch i<2> the lever f is raised by the spring f<4> so as to disengage the coiling-mechanism and permit the return of the rack by the weight n<1> so as to push the completed coil through the hollow shaft d. When a stop l<3> on the rack engages an arm l<1> on the rock shaft l the stop arm l<6> is withdrawn and the friction-roller k<3> is again moved forward to cause rotation of the cam shaft k. This shaft. carries cam projections o for engaging a lever o<1> for severing off a length of hollow cord. In order that the machine may be stopped when the supply of any of the wires is exhausted or when any wire breaks before reaching the guide, a series of notched plungers r resting by gravity on the wires and connected through the framing and solenoid w with one terminal of a source of electricity v, are provided so as to drop on to an insulated metal bar t connected to the other terminal so as to complete the circuit. The lever p' is thus lifted by the core x of the solenoid through the rod y and the lever p moved to the inoperative position by the spring p‹.